| Year | Count |
|---|---|
| 1911 | 11 |
| 1912 | 9 |
| 1913 | 9 |
| 1914 | 21 |
| 1915 | 13 |
| 1916 | 19 |
| 1917 | 17 |
| 1918 | 21 |
| 1919 | 16 |
| 1920 | 14 |
| 1921 | 16 |
| 1922 | 38 |
| 1923 | 44 |
| 1924 | 56 |
| 1925 | 36 |
| 1926 | 38 |
| 1927 | 52 |
| 1928 | 64 |
| 1929 | 36 |
| 1930 | 28 |
| 1931 | 15 |
| 1932 | 18 |
| 1933 | 9 |
| 1934 | 13 |
| 1935 | 10 |
| 1936 | 12 |
| 1937 | 9 |
| 1938 | 5 |
| 1939 | 8 |
| 1940 | 5 |
| 1941 | 14 |
| 1942 | 16 |
| 1943 | 13 |
| 1944 | 10 |
| 1946 | 9 |
| 1949 | 6 |
| 1952 | 6 |
| 1954 | 5 |
| 1956 | 5 |
| 1957 | 10 |